已知[tex=2.143x1.286]5u+Kfi2y78D0EeH+RhjPUA==[/tex]时正弦量的值为[tex=5.357x1.286]c6b5TwDROtJAN+303Dtl+A==[/tex]。相量图如图所示, 试写出正弦量的瞬时值表达式及相量式。[img=280x243]17d2e1d73c15bb8.png[/img]
举一反三
- 已知 [tex=9.786x1.571]yw+ozz7qALVBsBufXNJ627y5bwA+2vUjg0hck9X6BjruNFpD1qqi87FhVyXhu2dYEEy882iYQNESmATnG6Z2rQ==[/tex][tex=10.286x1.571]usUvMrfswiUAbYcbubVaedoQW6Zcj4OgQ5Z8AfDCvRQorN9IOO76py17r+1mbHNn/7ddWTAPnBdcpCi5mPISsw==[/tex](1) 求各正弦琩对应的相量, 并画出相量图;(2) 借助相量图, 求 [tex=2.5x1.214]rS9j4CErsxx3QhkYohVmPQ==[/tex](3) 求各正弦量的相量式 (复数式);(4) 借助复数求 [tex=2.214x1.214]SbNJGHPHmwKVdP7t6VPgHg==[/tex] 。注:正弦量与相量之间是一一对应的关系,只能用(→)表示,而不能用等号。
- 写出下列正弦电压的相量式,画出相量图,并求其和:[tex=10.929x2.786]s2RNrSZe2D8ifzjv/+ANjer5RnevM5nkna5gpxopbdpO04KNltFGhuhD3LOqs1eAztN8DXo7gv3BlOQhRbqv1blNJQuLCZ62i1+SItMJBIE=[/tex]
- 写出下列正弦电压的相量式,画出相量图,并求其和:[tex=10.214x2.214]s2RNrSZe2D8ifzjv/+ANjer5RnevM5nkna5gpxopbdpRpLvI4r4HqZxprLBo6Y+ao4dEmfSijJ+Pj3k173tvT8OsjGB3TBai54RTdMP2Y4I=[/tex]
- 写出下列正弦电压的相量式,画出相量图,并求其和:[tex=7.357x1.5]s2RNrSZe2D8ifzjv/+ANjXjWgvUl+gmD/SRzEHCp66zIE2DFesJV3KNoio9DRMgc[/tex]
- 写出下列正弦电压的相量式,画出相量图,并求其和:[tex=10.214x2.214]s2RNrSZe2D8ifzjv/+ANjer5RnevM5nkna5gpxopbdrUFeWJz8g5ESWOhqkEdS2HmRVbLUuFJfN5bLjGuz0lqryT9KvDNxttGdwEGviZBtg=[/tex][br][/br]